Supporting tower



July 14, 1925. f 1,545,612

D. R. SCHOLES SUPPORTING TOWER Filed Jan. 19. 19.25

Patented July 14, 1,925.

UNITED STATES PATENT OFFICE.

DANIEL R. SCHOLES, QF CHICAGO, ILLINOIS, ASSIG'NOR TO AERMOTOR COMPANY,

' 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

' SUPPORTING TOWER. i.

. Application filed January To all whom t may concer/n.:

Be it knownV that I, DANIEL R. SoHoLEs, a citizen of the United States, residing at Chicago, in the county of Cook and the State of Illinois, have invented a certain new and useful Improvement in Supporting Towers, of which the following isa full, clear, concise, and exact description.

My invention relates to supporting towers such as are employed for suspending-high tension circuitwires or other loads which towers of former construction are not properly adapted to carry. rlhe principal strainsV which such towers withstand may be listed as being inclusive of those due: (a) to the wind pressure on the wires and' to corners in the lines which' throw strains upon the cross arms parallel thereto; (b) to the breakage of one or more transmission wires on one side of the tower while remaining unbroken upon the other side,causing heavy strains to bc applied at right angles to the cross arm in an approximately horizontal direction at either end of the arm or at the middle thereof or at all three points along the arm; and (c) to the weight of thev wires and o'f the ice coatings forming thereon in winter time.

In carrying out my invention the tower is made up of an upwardly tapering main men'iber` and an-upwardly tapering supplemental member having faces that are deflected continuations of faces of the main member, the planes of the faces of said members, respectively, intersecting in a common horizontal line at which the cross arm or a group of cross arms, if such beemployed, is preferably supported.

In the preferred embodiment of: my invention the main or supplemental members of the supporting tower are pyramidal in form and there .are desirably two supplemental members which diverge upwardly and are symmetrically related upon opposite sides of the vertical axis ofthe main member. In thepreferred embodiment of the invention the main member is truncated, the bases of the supplemental members being coincident with each other and with the top of the main member. The invention however, is not to be thus limited.

The invention will be more fully explained in connection with the accompanying drawing in which Eig. l is a front face view 'of 19, 1925. Serial No. 3,372.

a tower as it is preferably constructed;

2 is a side'face view of the tower; and Fig. 3 is a diagrammatic view illustrating the intersections of the' planes of the faces of-the various members of the tower in a common horizontal line that is perpendicular to the upright axis of the main member.

The main upwardly tapering member l of the tower is in the form ofa truncated pyramid constructed of an angle iron, the angle iron corner posts or rails 2 thereof being suitably braced by angle iron members 3. The top of the truncated pyramid is inclusive of the four horizontal angle iron rails 4. These angle iron rails also constitute the bases of the supplemental members 5 that are desirably in the 'form of untruncated pyramids whose bases are constituted 4of the rails 4 of the top ofthe main pyramid, and whose faces are braced by the angle iron bracing members 6. The supplemental pyramids 5 diverge upwardly with respect to each other and are symmetrically related, the vertical axis of the main truncated pyramid passing' midway between the supplemental pyramids. Inasmuch as the supplement-al pyramids upwardly diverge, their axes are oblique to their common base and to theaxis of the main pyramidal member 1. The faces of the supplementalpyramids are deflected continuations of the faces of the main pyramid, as is madey most clear by reference to Fig. 3. The planes of the faces ofthe main and supplemental pyramids, re-

spectively, intersect in the same horizontal line where I- support a horizontal cross arm 7 With a tower structure as illustrated and described, certain of the stresses exerted upon the cross arm located as setv forth, are withstood without developing any undue stresses in the bracing members 3 of the main member of the tower. As a consequence these bracing members may be very light.

als

By causing the planes of the faces of the l main and supplemental members of the tower to converge in a single horizontal line, the corner rails of these members slant along lines that "also intersect in this horizontal line whereby, in the three-member tower illustrated, there is virtually a three point support for the cross arm or other load that loof' is desrably located in said horizontal line,

the corner rails of the three members being directed along lines that intersect at the location of the load.

The towerof my invention may be made of minimum weight consistent with the load to be supported and with the factor of safety employed. The'tower is of particular service in supporting the transmission mains 8 of a three-phase system of alternating current distribution. When the tower isV thus employed the main member thereof is truncated to afford ample clearance space for the middle main 8 above the main member and between the divergingsupplemental members, the transmission mains being supported from the ends of the cross arm andthe middle thereof through the intermediation of strings of insulators 9 in accordance 'with common practice. p

I claim: I -f l. A support including a main upright member of pyramidal formation; and upwardly diverging supplemental members also of pyramidal formation having faces that are deflected continuations of faces of the main member.

2. A support including an upwardly tapering main member; and upwardly tapering and upwardly diverging supplemental members having faces that are deflected continuations of faces of the main member.

3. A support including a main upright member of pyramidal form; and af supplemental member of pyramidal form having faces that are deflected continuations of faces of the main member and whose axis is angular to the axis of the main member.

' 4. A support including av main upright ymember of pyramidal form; and a supplemental member' of pyramidal form having faces that are deflected continuations of faces of the main member, the planes'of the pering main member; and an upwardly tapering supplemental member having faces that are deflected continuations of faces of the main member and Whose axis is angular to the axis of the main member.

7. A support including an upwardly ta-v pering mam member; and an upwardly ta pering supplemental member having faces that are deflected continuations of faces of the main member, the planes of the sides of said members intersecting in a common horizontal line, the axes of said members being angul-ar.\

8. A support including a main upright member of truncated pyramidal formation; upwardly diverging supplemental members also of pyramidal formation having faces that are deiected continuations of faces of the main member; and a horizontal cross arm carried by the supplemental members.

9. A support including an upwardly ta-` pering truncated main member; upwardly tapering and upwardly diverging supplemental 'members having faces that are deflected continuations of faces of the main member; and a horizontal cross arm carried by the supplemental members.

In witness whereof, I hereunto subscribe my name.

DANIEL R. scHoLEs. 

